You have identified a novel cytoplasmic protein.Sequence analysis revealed the presence of a number of serine/threonine phosphorylation motifs.Based on this data,you hypothesize that this protein may be a substrate for a

Question

Quizplus · Accepted Answer

The presence of serine/threonine phosphorylation motifs suggests that this protein may be phosphorylated by a protein kinase that specifically targets serine/threonine residues. Receptor tyrosine kinases phosphorylate tyrosine residues, not serine/threonine, and G-protein-coupled receptors do not have intrinsic kinase activity. Phosphotyrosine adapter proteins function as adaptors to recruit and organize signaling proteins, rather than directly phosphorylating other proteins.

You Have Identified a Novel Cytoplasmic Protein